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Serggg [28]
4 years ago
8

Which element has 7 valence electrons

Physics
2 answers:
nata0808 [166]4 years ago
7 0

Halogens have 7 valence electrons, which probably explains why they are the most active non-metals.

Phoenix [80]4 years ago
3 0

The elements in this family are fluorine, chlorine, bromine, iodine, and astatine. Halogens have 7 valence electrons, which explains why they are the most active non-metals. They are never found free in nature.

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Answer:

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Explanation:

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3 years ago
Is space expanding within clusters of galaxies? why or why not?
GarryVolchara [31]

No, since their gravity is powerful enough to keep them together even while the universe expands as a whole. Space is not expanding within clusters of galaxies.

<h3>What is a galaxy?</h3>

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2 years ago
Hooke's law describes an ideal spring. Many real springs are better described by the restoring force (F Sp ) s =−kΔs−q(Δs) 3 (p)
Montano1993 [528]

Answer with Explanation:

We are given that

Restoring force,(FS_p)s=-k\Delta s-q(\Delta s)^3

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q=750 N/m^3

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\Delta s=15 cm=0.15 m

Using 1 m=100 cm

Work done=\int_{0}^{0.15}-Fd(\Delta s)

W=-\int_{0}^{0.15}(-k\Delta s-q(\Delta s)^3))d(\Delta s)

W=k[\frac{(\Delta s)^2}{2}]^{0.15}_{0}+q[\frac{(\Delta s)^4}{4}]^{0.15}_{0}

W=0.01125k+0.000127q=0.01125\times 350+0.000127\times 750

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Percentage increase in work=\frac{4.033-3.938}{3.928}\times 100=2.4%

6 0
4 years ago
Explain the process of refraction using the key words: Speed, normal, angle
Tanzania [10]
Https://www.physicsclassroom.com/class/refrn/Lesson-2/The-Angle-of-Refraction
6 0
3 years ago
Please help!! This is the last question and i’m unsure! I will mark brainliest! Please try to provide a explanation you don’t ha
Flauer [41]

Answer:

True

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As of Newton's law, yes. Because when I land my feet on the ground, I apply a force. As per Newton's third law, the ground must apply the same force on me.

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7 0
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